+1
This commit is contained in:
alexandrev-tibco
@@ -0,0 +1,626 @@
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package main
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import (
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"bytes"
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"encoding/base64"
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"encoding/json"
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"fmt"
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"image/color"
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"log"
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"math"
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"net/http"
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"net/url"
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"os"
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"strings"
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"time"
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"github.com/fogleman/gg"
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"golang.org/x/image/font"
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"golang.org/x/image/font/gofont/gobold"
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"golang.org/x/image/font/gofont/goregular"
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"golang.org/x/image/font/opentype"
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"golang.org/x/text/currency"
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"golang.org/x/text/language"
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"golang.org/x/text/message"
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)
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const (
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imageWidth = 1200
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imageHeight = 630
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)
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type shareData struct {
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Name string `json:"n"`
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RealAmount json.Number `json:"r"`
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GoalAmount json.Number `json:"g"`
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Currency string `json:"c"`
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TargetDate string `json:"td"`
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EstimateCompletion string `json:"ec"`
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PrivateMode bool `json:"p"`
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}
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type shareView struct {
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Title string
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Description string
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OGImageURL string
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ShareURL string
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GoalName string
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CurrentAmount string
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TargetAmount string
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PercentText string
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ProgressPercent float64
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TargetDateLabel string
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EstimateDateLabel string
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PrivateMode bool
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FormattedGoalAmount string
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}
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func main() {
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port := os.Getenv("PORT")
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if port == "" {
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port = "8090"
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}
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http.HandleFunc("/share", shareHandler)
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http.HandleFunc("/og", ogHandler)
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log.Printf("og-service listening on :%s", port)
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log.Fatal(http.ListenAndServe(":"+port, nil))
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}
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func shareHandler(w http.ResponseWriter, r *http.Request) {
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dataParam := r.URL.Query().Get("data")
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if dataParam == "" {
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http.Error(w, "missing data parameter", http.StatusBadRequest)
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return
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}
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payload, err := decodeData(dataParam)
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if err != nil {
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http.Error(w, "invalid data parameter", http.StatusBadRequest)
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return
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}
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view := buildShareView(payload, r, dataParam)
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html := renderShareHTML(view)
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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w.Header().Set("Cache-Control", "no-store")
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_, _ = w.Write([]byte(html))
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}
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func ogHandler(w http.ResponseWriter, r *http.Request) {
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dataParam := r.URL.Query().Get("data")
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if dataParam == "" {
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http.Error(w, "missing data parameter", http.StatusBadRequest)
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return
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}
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payload, err := decodeData(dataParam)
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if err != nil {
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http.Error(w, "invalid data parameter", http.StatusBadRequest)
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return
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}
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pngBytes, err := renderOGImage(payload)
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if err != nil {
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http.Error(w, "failed to render image", http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "image/png")
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w.Header().Set("Cache-Control", "public, max-age=3600")
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_, _ = w.Write(pngBytes)
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}
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func decodeData(param string) (shareData, error) {
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var data shareData
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decoded, err := base64.RawURLEncoding.DecodeString(param)
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if err != nil {
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decoded, err = base64.URLEncoding.DecodeString(param)
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if err != nil {
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return data, err
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}
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}
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dec := json.NewDecoder(bytes.NewReader(decoded))
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dec.UseNumber()
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if err := dec.Decode(&data); err != nil {
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return data, err
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}
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data.Name = strings.TrimSpace(data.Name)
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data.Currency = strings.ToUpper(strings.TrimSpace(data.Currency))
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if data.Currency == "" {
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data.Currency = "USD"
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}
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return data, nil
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}
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func buildShareView(data shareData, r *http.Request, rawParam string) shareView {
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goalAmount, _ := numberToFloat(data.GoalAmount)
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realAmount, _ := numberToFloat(data.RealAmount)
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percent := 0.0
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if goalAmount > 0 {
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percent = (realAmount / goalAmount) * 100
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}
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percentText := "Progress unavailable"
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if goalAmount > 0 {
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percentText = fmt.Sprintf("%.0f%% complete", percent)
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}
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currencyTag := localeForCurrency(data.Currency)
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formattedGoal := formatCurrency(goalAmount, data.Currency, currencyTag)
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formattedReal := formatCurrency(realAmount, data.Currency, currencyTag)
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currentAmount := formattedReal
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if data.PrivateMode {
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currentAmount = "Hidden"
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}
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goalName := data.Name
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if goalName == "" {
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goalName = "Investment Goal"
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}
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description := fmt.Sprintf("%s toward %s", percentText, formattedGoal)
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if data.PrivateMode {
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description = fmt.Sprintf("Goal progress: %s", percentText)
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}
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baseURL := buildBaseURL(r)
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shareURL := fmt.Sprintf("%s/share?data=%s", baseURL, url.QueryEscape(rawParam))
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ogImageURL := fmt.Sprintf("%s/og?data=%s", baseURL, url.QueryEscape(rawParam))
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return shareView{
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Title: fmt.Sprintf("Portfolio Journal — %s", goalName),
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Description: description,
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OGImageURL: ogImageURL,
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ShareURL: shareURL,
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GoalName: goalName,
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CurrentAmount: currentAmount,
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TargetAmount: formattedGoal,
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PercentText: percentText,
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ProgressPercent: percent,
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TargetDateLabel: formatDateLabel("Target", data.TargetDate),
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EstimateDateLabel: formatDateLabel("Est. completion", data.EstimateCompletion),
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PrivateMode: data.PrivateMode,
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FormattedGoalAmount: formattedGoal,
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}
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}
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func renderShareHTML(view shareView) string {
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htmlTemplate := `<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>` + escapeHTML(view.Title) + `</title>
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<meta name="title" content="` + escapeHTML(view.Title) + `">
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<meta name="description" content="` + escapeHTML(view.Description) + `">
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<meta name="author" content="Portfolio Journal">
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<meta name="robots" content="noindex, nofollow">
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<meta property="og:type" content="website">
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<meta property="og:url" content="` + escapeHTML(view.ShareURL) + `">
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<meta property="og:title" content="` + escapeHTML(view.Title) + `">
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<meta property="og:description" content="` + escapeHTML(view.Description) + `">
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<meta property="og:image" content="` + escapeHTML(view.OGImageURL) + `">
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<meta property="og:image:width" content="1200">
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<meta property="og:image:height" content="630">
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<meta property="og:site_name" content="Portfolio Journal">
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<meta property="og:locale" content="en_US">
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<meta name="twitter:card" content="summary_large_image">
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<meta name="twitter:url" content="` + escapeHTML(view.ShareURL) + `">
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<meta name="twitter:title" content="` + escapeHTML(view.Title) + `">
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<meta name="twitter:description" content="` + escapeHTML(view.Description) + `">
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<meta name="twitter:image" content="` + escapeHTML(view.OGImageURL) + `">
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<meta name="apple-itunes-app" content="app-id=6744983373">
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<link rel="canonical" href="` + escapeHTML(view.ShareURL) + `">
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<style>
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* { margin: 0; padding: 0; box-sizing: border-box; }
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body {
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font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
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background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
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min-height: 100vh;
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display: flex;
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align-items: center;
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justify-content: center;
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padding: 24px;
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color: #fff;
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}
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.card {
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max-width: 620px;
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width: 100%;
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background: rgba(255,255,255,0.12);
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border-radius: 24px;
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padding: 40px;
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backdrop-filter: blur(18px);
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box-shadow: 0 24px 60px rgba(0,0,0,0.25);
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}
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.eyebrow {
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text-transform: uppercase;
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letter-spacing: 0.12em;
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font-size: 0.75rem;
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opacity: 0.8;
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margin-bottom: 12px;
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}
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h1 {
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font-size: 2rem;
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margin-bottom: 16px;
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}
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.amounts {
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display: grid;
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grid-template-columns: 1fr 1fr;
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gap: 16px;
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margin-bottom: 16px;
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}
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.amounts span {
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display: block;
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font-size: 0.9rem;
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opacity: 0.8;
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}
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.amounts strong {
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display: block;
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font-size: 1.5rem;
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margin-top: 6px;
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}
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.progress {
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height: 14px;
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border-radius: 999px;
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background: rgba(255,255,255,0.25);
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overflow: hidden;
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margin-top: 16px;
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}
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.progress .bar {
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height: 100%;
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background: #fff;
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width: ` + fmt.Sprintf("%.2f", math.Max(0, math.Min(100, view.ProgressPercent))) + `%;
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}
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.meta {
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margin-top: 18px;
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font-size: 0.9rem;
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opacity: 0.85;
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}
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.cta {
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margin-top: 28px;
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display: inline-flex;
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align-items: center;
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gap: 10px;
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background: #fff;
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color: #5c5bd4;
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padding: 12px 20px;
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border-radius: 14px;
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font-weight: 600;
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text-decoration: none;
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}
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</style>
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</head>
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<body>
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<div class="card">
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<div class="eyebrow">Portfolio Journal</div>
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<h1>` + escapeHTML(view.GoalName) + `</h1>
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<div class="amounts">
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<div>
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<span>Current amount</span>
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<strong>` + escapeHTML(view.CurrentAmount) + `</strong>
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</div>
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<div>
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<span>Goal amount</span>
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<strong>` + escapeHTML(view.TargetAmount) + `</strong>
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</div>
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</div>
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<div>` + escapeHTML(view.PercentText) + `</div>
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<div class="progress"><div class="bar"></div></div>
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<div class="meta">` + escapeHTML(joinLabels(view.TargetDateLabel, view.EstimateDateLabel)) + `</div>
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<a class="cta" href="https://apps.apple.com/app/portfolio-journal/id6744983373">Download on the App Store</a>
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</div>
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</body>
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</html>`
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return htmlTemplate
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}
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func renderOGImage(data shareData) ([]byte, error) {
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goalAmount, _ := numberToFloat(data.GoalAmount)
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realAmount, _ := numberToFloat(data.RealAmount)
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percent := 0.0
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if goalAmount > 0 {
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percent = (realAmount / goalAmount) * 100
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}
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currencyTag := localeForCurrency(data.Currency)
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formattedGoal := formatCurrency(goalAmount, data.Currency, currencyTag)
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formattedReal := formatCurrency(realAmount, data.Currency, currencyTag)
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if data.PrivateMode {
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formattedReal = "Hidden"
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}
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goalName := data.Name
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if goalName == "" {
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goalName = "Investment Goal"
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}
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dc := gg.NewContext(imageWidth, imageHeight)
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grad := gg.NewLinearGradient(0, 0, imageWidth, imageHeight)
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grad.AddColorStop(0, color.RGBA{0x66, 0x7e, 0xea, 0xff})
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grad.AddColorStop(1, color.RGBA{0x76, 0x4b, 0xa2, 0xff})
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dc.SetFillStyle(grad)
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dc.DrawRectangle(0, 0, imageWidth, imageHeight)
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dc.Fill()
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marginX := 80.0
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marginY := 80.0
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// App icon placeholder
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dc.SetRGBA(1, 1, 1, 0.2)
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dc.DrawRoundedRectangle(marginX, marginY, 96, 96, 22)
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dc.Fill()
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iconFace, err := loadFontFace(38, true)
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if err != nil {
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return nil, err
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}
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dc.SetFontFace(iconFace)
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dc.SetRGBA(1, 1, 1, 0.9)
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dc.DrawStringAnchored("PJ", marginX+48, marginY+52, 0.5, 0.5)
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labelFace, err := loadFontFace(20, false)
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if err != nil {
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return nil, err
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}
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dc.SetFontFace(labelFace)
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dc.SetRGBA(1, 1, 1, 0.8)
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dc.DrawString("Portfolio Journal", marginX+120, marginY+34)
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titleFace, err := loadFontFace(54, true)
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if err != nil {
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return nil, err
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}
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dc.SetFontFace(titleFace)
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dc.SetRGBA(1, 1, 1, 1)
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goalName = fitText(dc, goalName, imageWidth-160)
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dc.DrawStringWrapped(goalName, marginX, marginY+130, 0, 0, imageWidth-160, 1.3, gg.AlignLeft)
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valueFace, err := loadFontFace(36, true)
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if err != nil {
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return nil, err
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}
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labelSmallFace, err := loadFontFace(18, false)
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if err != nil {
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return nil, err
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}
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dc.SetFontFace(labelSmallFace)
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dc.SetRGBA(1, 1, 1, 0.75)
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dc.DrawString("Current", marginX, marginY+260)
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dc.DrawString("Goal", marginX+420, marginY+260)
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dc.SetFontFace(valueFace)
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dc.SetRGBA(1, 1, 1, 1)
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dc.DrawString(formattedReal, marginX, marginY+305)
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dc.DrawString(formattedGoal, marginX+420, marginY+305)
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percentText := "Progress unavailable"
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if goalAmount > 0 {
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percentText = fmt.Sprintf("%.0f%% complete", percent)
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}
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if data.PrivateMode {
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percentText = strings.ReplaceAll(percentText, "complete", "of goal")
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}
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dc.SetFontFace(labelSmallFace)
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dc.SetRGBA(1, 1, 1, 0.85)
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dc.DrawString(percentText, marginX, marginY+360)
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barWidth := 720.0
|
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barHeight := 18.0
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barX := marginX
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barY := marginY + 380
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progress := math.Max(0, math.Min(100, percent)) / 100
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dc.SetRGBA(1, 1, 1, 0.25)
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dc.DrawRoundedRectangle(barX, barY, barWidth, barHeight, 9)
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dc.Fill()
|
||||
|
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dc.SetRGBA(1, 1, 1, 0.9)
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dc.DrawRoundedRectangle(barX, barY, barWidth*progress, barHeight, 9)
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dc.Fill()
|
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meta := joinLabels(formatDateLabel("Target", data.TargetDate), formatDateLabel("Est. completion", data.EstimateCompletion))
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if meta != "" {
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dc.SetFontFace(labelSmallFace)
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dc.SetRGBA(1, 1, 1, 0.7)
|
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dc.DrawString(meta, marginX, marginY+430)
|
||||
}
|
||||
|
||||
ctaFace, err := loadFontFace(20, true)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
dc.SetFontFace(ctaFace)
|
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dc.SetRGBA(1, 1, 1, 0.9)
|
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dc.DrawString("Available on the App Store", marginX, imageHeight-70)
|
||||
|
||||
buf := bytes.NewBuffer(nil)
|
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if err := dc.EncodePNG(buf); err != nil {
|
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return nil, err
|
||||
}
|
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return buf.Bytes(), nil
|
||||
}
|
||||
|
||||
func numberToFloat(n json.Number) (float64, bool) {
|
||||
if n.String() == "" {
|
||||
return 0, false
|
||||
}
|
||||
value, err := n.Float64()
|
||||
if err != nil {
|
||||
return 0, false
|
||||
}
|
||||
return value, true
|
||||
}
|
||||
|
||||
func formatCurrency(amount float64, code string, tag language.Tag) string {
|
||||
unit, err := currency.ParseISO(code)
|
||||
if err != nil {
|
||||
unit = currency.USD
|
||||
}
|
||||
printer := message.NewPrinter(tag)
|
||||
return printer.Sprintf("%v", currency.Amount(amount, unit))
|
||||
}
|
||||
|
||||
func localeForCurrency(code string) language.Tag {
|
||||
switch code {
|
||||
case "EUR":
|
||||
return language.MustParse("es-ES")
|
||||
case "GBP":
|
||||
return language.MustParse("en-GB")
|
||||
case "JPY":
|
||||
return language.MustParse("ja-JP")
|
||||
case "CNY":
|
||||
return language.MustParse("zh-CN")
|
||||
case "HKD":
|
||||
return language.MustParse("zh-HK")
|
||||
case "KRW":
|
||||
return language.MustParse("ko-KR")
|
||||
case "INR":
|
||||
return language.MustParse("en-IN")
|
||||
case "BRL":
|
||||
return language.MustParse("pt-BR")
|
||||
case "MXN":
|
||||
return language.MustParse("es-MX")
|
||||
case "ARS":
|
||||
return language.MustParse("es-AR")
|
||||
case "CLP":
|
||||
return language.MustParse("es-CL")
|
||||
case "COP":
|
||||
return language.MustParse("es-CO")
|
||||
case "CAD":
|
||||
return language.MustParse("en-CA")
|
||||
case "AUD":
|
||||
return language.MustParse("en-AU")
|
||||
case "NZD":
|
||||
return language.MustParse("en-NZ")
|
||||
case "CHF":
|
||||
return language.MustParse("de-CH")
|
||||
case "SEK":
|
||||
return language.MustParse("sv-SE")
|
||||
case "NOK":
|
||||
return language.MustParse("nb-NO")
|
||||
case "DKK":
|
||||
return language.MustParse("da-DK")
|
||||
case "PLN":
|
||||
return language.MustParse("pl-PL")
|
||||
case "CZK":
|
||||
return language.MustParse("cs-CZ")
|
||||
case "HUF":
|
||||
return language.MustParse("hu-HU")
|
||||
case "TRY":
|
||||
return language.MustParse("tr-TR")
|
||||
case "ZAR":
|
||||
return language.MustParse("en-ZA")
|
||||
case "AED":
|
||||
return language.MustParse("ar-AE")
|
||||
default:
|
||||
return language.MustParse("en-US")
|
||||
}
|
||||
}
|
||||
|
||||
func formatDateLabel(prefix, dateString string) string {
|
||||
if dateString == "" {
|
||||
return ""
|
||||
}
|
||||
parsed, err := time.Parse("2006-01-02", dateString)
|
||||
if err != nil {
|
||||
return ""
|
||||
}
|
||||
return fmt.Sprintf("%s: %s", prefix, parsed.Format("Jan 2, 2006"))
|
||||
}
|
||||
|
||||
func joinLabels(primary, secondary string) string {
|
||||
if primary == "" && secondary == "" {
|
||||
return ""
|
||||
}
|
||||
if primary == "" {
|
||||
return secondary
|
||||
}
|
||||
if secondary == "" {
|
||||
return primary
|
||||
}
|
||||
return primary + " • " + secondary
|
||||
}
|
||||
|
||||
func buildBaseURL(r *http.Request) string {
|
||||
proto := r.Header.Get("X-Forwarded-Proto")
|
||||
if proto == "" {
|
||||
proto = "https"
|
||||
}
|
||||
host := r.Header.Get("X-Forwarded-Host")
|
||||
if host == "" {
|
||||
host = r.Host
|
||||
}
|
||||
return fmt.Sprintf("%s://%s", proto, host)
|
||||
}
|
||||
|
||||
func escapeHTML(input string) string {
|
||||
replacer := strings.NewReplacer(
|
||||
"&", "&",
|
||||
"<", "<",
|
||||
">", ">",
|
||||
"\"", """,
|
||||
"'", "'",
|
||||
)
|
||||
return replacer.Replace(input)
|
||||
}
|
||||
|
||||
func loadFontFace(size float64, bold bool) (font.Face, error) {
|
||||
var fontBytes []byte
|
||||
if bold {
|
||||
fontBytes = gobold.TTF
|
||||
} else {
|
||||
fontBytes = goregular.TTF
|
||||
}
|
||||
parsed, err := opentype.Parse(fontBytes)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
face, err := opentype.NewFace(parsed, &opentype.FaceOptions{
|
||||
Size: size,
|
||||
DPI: 72,
|
||||
Hinting: font.HintingFull,
|
||||
})
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return face, nil
|
||||
}
|
||||
|
||||
func fitText(dc *gg.Context, text string, maxWidth float64) string {
|
||||
trimmed := strings.TrimSpace(text)
|
||||
if trimmed == "" {
|
||||
return ""
|
||||
}
|
||||
if width, _ := dc.MeasureString(trimmed); width <= maxWidth {
|
||||
return trimmed
|
||||
}
|
||||
|
||||
runes := []rune(trimmed)
|
||||
for len(runes) > 0 {
|
||||
candidate := string(runes) + "…"
|
||||
if width, _ := dc.MeasureString(candidate); width <= maxWidth {
|
||||
return candidate
|
||||
}
|
||||
runes = runes[:len(runes)-1]
|
||||
}
|
||||
return trimmed
|
||||
}
|
||||
Reference in New Issue
Block a user